30031100081 has 2 divisors, whose sum is σ = 30031100082. Its totient is φ = 30031100080.

The previous prime is 30031100059. The next prime is 30031100093. The reversal of 30031100081 is 18000113003.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20277760000 + 9753340081 = 142400^2 + 98759^2 .

It is an emirp because it is prime and its reverse (18000113003) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30031100081 - 2¹⁸ = 30030837937 is a prime.

It is a super-2 number, since 2×30031100081² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (30031100581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15015550040 + 15015550041.

It is an arithmetic number, because the mean of its divisors is an integer number (15015550041).

Almost surely, 2^30031100081 is an apocalyptic number.

It is an amenable number.

30031100081 is a deficient number, since it is larger than the sum of its proper divisors (1).

30031100081 is an equidigital number, since it uses as much as digits as its factorization.

30031100081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 30031100081 its reverse (18000113003), we get a palindrome (48031213084).

The spelling of 30031100081 in words is "thirty billion, thirty-one million, one hundred thousand, eighty-one".